Hi Red here,
I am new to Tech Support Guy, please forgive any mistakes as those of ignorance not arrogance.
I am hoping that someone has already written themselves a spreadsheet that they are willing to share... because I have burnt out out way too many braincells trying to create something that works. I
am an advanced Excel user, but this one has me stumped.

. I either need help from someone who knows how to perform very complex time calculations in Excel or I need a freeware calculator application I can download fast that will help me out.
I am testing a new call management system that includes automatic escalation to the management should a call not be responded to or resolved within a specified time frame. Escalation is a matter of hours (respond) or days (resolve). The 'resolve by' calculations are very easy, they are working fine. However the 'respond by' time is dependent on the start/end times of the day, whether or not weekends are worked and the timeframe within which the management wants to see escalation happening e.g. "I want to know if no response after X hours (level 1) and again at Y hours (level 2)". The System is capable of accepting this data, varied by department (ours have different hours of operation), and using the data to calculate the day (date) and time on which an alert will be sent to the management following receipt of said inquiry, should no response have been sent to the inquirer.
MY task is to verify the escalation calculations (the system has been horribly inaccurate in previous tests) and in order to do this I am given a spreadsheet of 'submission date/times' on which I am to input MANUALLY the expected escalation times for each department at a defined first and second level, prior to creating the inquiries themselves in the test system and checking whether
their calculations match
my expectations. It takes me longer to fill out this spreadsheet with the expected times than it does to carry out the system test itself!
I have found out (boy have I) that Excel really isn't amenable to this kind of elasped time calculation, mainly because some of my time elapses extend beyond 24 hours when you take the business hours into account. Unfortunately, Excel is the only tool I have available to me for this job right now, Access simply isn't an option.
Last but not least, I looked at downloading freeware call management software but that means doing the same job twice (creating a pretend call) and I would have no way of knowing whether the downloaded application was performing the calculations correctly without (yep, you guessed it) working out the times manually...
So LOOOOOOONG story short. I need an Excel worksheet where I can plug the data into an array and have the correct escalation time squirt out the other end of a formula. Or a freely available application where I can do the same.
Any assistance VERY GRATEFULLY received!
Cheers
Red